Don’t leave it to chance – unchecked appliances could pose a risk to you and your family

All gas appliances in your property need to be safety checked by a Gas Safe registered engineer annually and serviced according to manufacturer’s instructions. Any appliance left unchecked could leave you at risk of carbon monoxide poisoning. It’s an extremely good idea to have your gas pipework inspected at the same time as having a boiler service, every year – and it’s law if you’re a landlord.


What happens during the boiler service visit?

We’ll inspect your boiler and controls to make sure they’re working properly.

We'll check your boiler for corrosion and leaks.

We’ll remove the casing of your boiler to inspect the main components.

We’ll check the gas pressure.

We’ll test the flue to make sure it’s not emitting any unsafe fumes.

We’ll clean the parts (if tests indicate they need it).

We’ll put the casing back on and check the seals.

We’ll fill in your benchmark certificate boiler service record.

We'll email you a boiler service - gas safety certificate for your records.

When assessing an unsafe gas appliance, we will follow the Gas Industry Unsafe Situations Procedure (GIUSP) which provides ‘best practice’ advice to engineers on how to deal with specific gas safety concerns.

After we have serviced or checked your appliance, we will issue you by email a report detailing the checks we’ve carried out. This could be a Gas Safety Record, depending on what work we have.

Flues, chimneys and air vents

These all play an important role in the safe operation of gas appliances, allowing products of combustion to escape and ensuring a high level of ventilation. As cold as it might get during winter, never block up these airways – this could result in a build up of carbon monoxide in your home.

Chimneys will need to be checked every year for blockages (such as birds’ nests and debris) which can prevent dangerous fumes from escaping. We will be on the lookout for these.

If you live in a property with a shared flue or chimney, you’ll need to share responsibility with others to ensure they are checked annually as it’s possible for carbon monoxide to enter properties through these shared vents.


If you notice any of the following warning signs, you’ll want to get your appliance serviced right away:


What’s the difference between a landlords gas safety check and a boiler service?

Prior to any work being carried out it is important to agree the scope of the work so that everyone is clear. For example, there are differences between an appliance/boiler service and a landlords gas safety check.

What is a landlords gas Safety Check?

A landlords gas safety check or CP12 at a minimum includes all of the checks and tests to ensure the appliance is safe to operate, for example:


What is a boiler Service?

An appliance or boiler service will include specific checks, for inspection and/or cleaning of the appliance as specified and detailed in the appliance manufacturer’s instructions. This may include:

This is not an exhaustive list and servicing requirements will vary across appliance types and models. 

Note: Some appliance servicing regimes provide an interim performance check (annual) to be used in order to determine the degree of dismantling the appliance and the level of servicing required.